From 3371a27391e828c6417e6d805572cf261b138785 Mon Sep 17 00:00:00 2001
From: James Bursa <james@netsurf-browser.org>
Date: Fri, 3 Sep 2004 22:44:48 +0000
Subject: [project @ 2004-09-03 22:44:47 by bursa] Add generic bitmap
 functions. Move jpeg and mng code from riscos/ to image/ and update to use
 bitmap. Note: background tiling and drawfile export for jpeg and mng/png are
 broken.

svn path=/import/netsurf/; revision=1265
---
 gtk/gtk_bitmap.c | 131 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 gtk/gtk_bitmap.c

(limited to 'gtk/gtk_bitmap.c')

diff --git a/gtk/gtk_bitmap.c b/gtk/gtk_bitmap.c
new file mode 100644
index 000000000..7aaedf075
--- /dev/null
+++ b/gtk/gtk_bitmap.c
@@ -0,0 +1,131 @@
+/*
+ * This file is part of NetSurf, http://netsurf.sourceforge.net/
+ * Licensed under the GNU General Public License,
+ *                http://www.opensource.org/licenses/gpl-license
+ * Copyright 2004 James Bursa <bursa@users.sourceforge.net>
+ */
+
+/** \file
+ * Generic bitmap handling (GDK / GTK+ implementation).
+ *
+ * This implements the interface given by desktop/bitmap.h using GdkPixbufs.
+ */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <string.h>
+#include <gdk/gdk.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include "netsurf/content/content.h"
+#include "netsurf/image/bitmap.h"
+
+
+extern GdkDrawable *current_drawable;
+extern GdkGC *current_gc;
+
+
+struct bitmap;
+
+
+/**
+ * Create a bitmap.
+ *
+ * \param  width   width of image in pixels
+ * \param  height  width of image in pixels
+ * \return an opaque struct bitmap, or NULL on memory exhaustion
+ */
+
+struct bitmap *bitmap_create(int width, int height)
+{
+	GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8,
+			width, height);
+	return (struct bitmap *) pixbuf;
+}
+
+
+/**
+ * Return a pointer to the pixel data in a bitmap.
+ *
+ * \param  bitmap  a bitmap, as returned by bitmap_create()
+ * \return pointer to the pixel buffer
+ *
+ * The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end
+ * of rows. The width of a row in bytes is given by bitmap_get_rowstride().
+ */
+
+char *bitmap_get_buffer(struct bitmap *bitmap)
+{
+	assert(bitmap);
+	return gdk_pixbuf_get_pixels((GdkPixbuf *) bitmap);
+}
+
+
+/**
+ * Find the width of a pixel row in bytes.
+ *
+ * \param  bitmap  a bitmap, as returned by bitmap_create()
+ * \return width of a pixel row in the bitmap
+ */
+
+size_t bitmap_get_rowstride(struct bitmap *bitmap)
+{
+	assert(bitmap);
+	return gdk_pixbuf_get_rowstride((GdkPixbuf *) bitmap);
+}
+
+
+/**
+ * Free a bitmap.
+ *
+ * \param  bitmap  a bitmap, as returned by bitmap_create()
+ */
+
+void bitmap_destroy(struct bitmap *bitmap)
+{
+	assert(bitmap);
+	g_object_unref((GdkPixbuf *) bitmap);
+}
+
+
+/**
+ * Render a bitmap.
+ */
+
+bool bitmap_redraw(struct content *c, int x, int y,
+		int width, int height,
+		int clip_x0, int clip_y0, int clip_x1, int clip_y1,
+		float scale, unsigned long background_colour)
+{
+	GdkPixbuf *scaled;
+
+	scaled = gdk_pixbuf_scale_simple((GdkPixbuf  *) c->bitmap,
+			width, height,
+			GDK_INTERP_BILINEAR);
+	if (!scaled)
+		return false;
+
+	gdk_draw_pixbuf(current_drawable, current_gc,
+			scaled,
+			0, 0,
+			x, y,
+			width, height,
+			GDK_RGB_DITHER_NORMAL, 0, 0);
+
+	g_object_unref(scaled);
+
+	return true;
+}
+
+
+/**
+ * Save a bitmap in the platform's native format.
+ *
+ * \param  bitmap  a bitmap, as returned by bitmap_create()
+ * \param  path    pathname for file
+ * \return true on success, false on error and error reported
+ */
+
+bool bitmap_save(struct bitmap *bitmap, const char *path)
+{
+	return true;
+}
-- 
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